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rpmdiag, Tech and Instructor
Category: Nissan
Satisfied Customers: 7871
Experience:  Since 1975
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I have an 08 Altima it drives fine until you put it on the

Customer Question

I have an 08 Altima it drives fine until you put it on the interstate traveling at a high rate of speed for a while then it starts slipping
JA: Will the headlights turn on? Is the battery fully charged?
Customer: I I haven't noticed any
JA: Are you fixing your Altima yourself? What have you tried so far?
Customer: I'm sorry yes the lights will come on and I have not tried fixing it myself could I add some trans x to the transmission fill tube
JA: Anything else you want the mechanic to know before I connect you?
Customer: Nothing other than adding trans x to the transmission
Submitted: 11 months ago.
Category: Nissan
Expert:  rpmdiag replied 11 months ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 11 months ago.

Here’s the sequence of events I follow:

Check fluid level and color.Make appropriate repairs.

Check shift solenoids with a scan tool in bidirectional mode if applicable. Shift solenoids are inside the transmission and this is the easiest way to check them.

Drop pan and inspect for excessive metal shavings inside pan.

Check valve body and clutches visually.

Hopefully you may not have to go this far, maybe you just were a bit low on fluid.

Expert:  Jake replied 11 months ago.

Hey there, Nissan expert here.

There are some VERY IMPORTANT things you need to know about these CVT transmissions. The first is that Nissan extended the warranty coverage for 10 years/120k miles, but the fluid has a VERY LOW contamination tolerance and does not do well with additives, so adding trans X was not a good idea at all and it's not uncommon on CVT failures for us to send the fluid out for a lab analysis to make sure it is just Nissan NS-2 fluid. If you have any trouble codes let me know please and I can give you the most likely cause from experience with these transmissions.

Expert:  rpmdiag replied 11 months ago.

My apologies for that rude interruption from the other expert.

That's not how we do things here especially since you Havoline even replied back to me yet.

Please let me know how else I can help you or if you have any more questions.

If you're happy with my reply to, please go ahead and rate me 5 stars for my time.

Thanks again, Ron

Expert:  rpmdiag replied 11 months ago.

Hi, I'm just following up with you to see if you have any more questions.
Thanks, Ron